* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  list-style: none;
}
html {
  font-size: 100px;
  width: 100%;
}
body {
  font-size: 16px;
  width: 100%;
}
a {
  text-decoration: none;
  color: black;
}
.container {
  width: 500px;
  height: 280px;
  margin: 0 auto;
}
.container .img-wrap {
  width: 100%;
  height: 100%;
}
.container .img-wrap img {
  width: 100%;
  height: 100%;
}
.container .list {
  width: 500px;
  height: 40px;
  background-color: #afafaf;
  clear: both;
}
.container .list ul {
  clear: both;
  float: right;
}
.container .list ul li {
  float: left;
  width: 40px;
  height: 40px;
  text-align: center;
  line-height: 40px;
  color: white;
  font-size: 18px;
  margin-left: 1px;
  background-color: #999999;
}
.container .list ul li.change {
  background-color: red;
}
